具有饱和恢复率的SEIR时滞模型的行波解

研究一类具有饱和恢复率的SEIR时滞模型的行波解.首先,考虑一类二维系统初值问题的适定性;然后,通过构造一对有界的向量值上、下解得到一个闭凸集;最后,利用Schauder不动点定理证明:当基本再生数R^(0)>1,波速c>c^(*)时模型存在非平凡行波解.

Existence of Positive Solutions for a Third-Order Multi-Point Boundary Value Problem

By using Leray-Schauder nonlinear alternative, Banach contraction theorem and Guo-Krasnosel’skii theorem, we discuss the existence, uniqueness and positivity of solution to the third-order multi-point nonhomogeneous boundary value problem (BVP1): where for The interesting point lies in the fact that the nonlinear term is allowed to depend on the first order derivative .

A QUASILINEAR SINGULAR ELLIPTIC SYSTEM WITHOUT COOPERATIVE STRUCTURE

In this article, we investigate the existence of positive solutions of a singular quasilinear elliptic system for which the cooperative structure is not required. The approach is based on the Schauder fixed point theorem combined with perturbation arguments that involve the singular terms.

S-分布时滞随机神经网络的适定性和均方指数吸引性

考虑了一类S-分布时滞随机神经网络的动力学行为。利用不动点理论和不等式技巧,讨论了该网络的适定性,证明了其解的均方指数吸引性,给出了易于验证的吸引性判据。实例说明了结论的正确性。

Existence and Uniqueness of Anti-periodic Solutions for 2n-order Differential Equations

In this paper, we study the anti-periodic solutions for 2n-th order differential equations. By using the Schauder＇s fixed point theorem, we present some new results about the existence and uniqueness of anti-periodic solutions for 2n-th order differential equations.

S-分布时滞神经网络概周期解的全局渐近稳定性

利用不动点理论和微分不等式技巧研究了S-分布时滞局域递归神经网络模型的概周期解,给出了概周期解存在性和全局渐近稳定性的充分条件。

Traveling Wavefronts on Reaction Diffusion Systems with Spatio-Temporal Delays

By using Schauder’s Fixed Point Theorem, we study the existence of traveling wave fronts for reaction-diffusion systems with spatio-temporal delays. In our results, we reduce the existence of traveling wave fronts to the existence of an admissible pair of upper solution and lower solution which are much easier to construct in practice.

Positive Solutions for Singular Boundary Value Problems of Coupled Systems of Nonlinear Differential Equations

We establish the existence of positive solutions for singular boundary value problems of coupled systems? The proof relies on Schauder’s fixed point theorem. Some recent results in the literature are generalized and improved.

Existence of Solutions for Some <i>p</i>(<i>x</i>)-polyharmonic Elliptic Kirchhoff Equations

In this paper, we study the existence of solution for some p(x)-polyharmonic Kirchhoff equations. The latter is allowed to vanish at the origin (degenerate case). Firstly, we study the existence of solutions of approximate equations. Secondly, we prove the existence of the solutions of the original equation. The main tool is the Schauder’s Theorem.

Existence of Traveling Waves in Lattice Dynamical Systems

Existence of traveling wave solutions for some lattice differential equations is investigated. We prove that there exists c*>0 such that for each c≥c*, the systems under consideration admit monotonic nondecreasing traveling waves.

Skewperiodic Boundary Value Problems for Second Order Nonlinear Differential Equations

In this paper a uniqueness theorem for a skewperiodic boundary value problem is obtained. By using the optimal control method, we derive the best estimate for the integration mean ensuring that the results hold.

Liénard型方程周期解的存在性

利用Sobolev空间范数,给出了一般形式的Liénard型方程周期解估计,通过Schauder不动点定理,证明了周期解的存在性。

一阶奇异耦合方程组周期边值问题的解(英文)

研究一阶奇异半正耦合微分方程组周期边值问题.对该方程组不同的半正形式,建立半正耦合方程组周期边值问题解的存在性的充分条件,定理的证明依赖于Schauder不动点定理。

一类三点边值问题解的存在性

研究一类二阶非线性常微分方程三点边值问题解的存在性,利用Schauder不动点定理得到了方程解存在的充分条件.

一类非线性Caputo型分数阶微分方程解的存在性

研究Banach空间中一类非线性分数阶微分方程解的存在性.利用Krasnosel’skii不动点定理和LeraySchauder度理论,得到了该边值问题解的存在性定理.作为主要结论的应用,给出两个例子验证了所得结果.

一类带有分数阶积分边值条件的分数阶微分方程的可解性(英文)

本文研究下面一类带有分数阶积分边值条件的分数阶微分方程cDα0+u(t)=f(t,u(t),cDβ0+u(t)),0<t<1,2<α<3,u(0)=0,u′(0)=Iθ0+u(0),u″(1)=Iθ0+u(1).通过计算得到分数阶格林函数并利用Leray-Schauder度理论及Banach不动点定理,获得解的存在性和唯一性结果,推广了以往的结果.

分数阶脉冲微分方程边值问题解的存在性

为了解决对半无穷区间上具有可数个脉冲点且带有积分边界条件的分数阶脉冲微分方程边值问题,具体研究此类微分方程边值问题解的存在性。通过定义合适的Banach空间、范数以及算子,合理运用分数阶微积分的性质,分别应用压缩映像原理和Krasnoselskii不动点定理证明了分数阶脉冲微分方程边值问题解的存在性,最后通过实例验证了此类方程边值问题解的存在性。

一类非线性三阶两点边值问题解和正解的存在性

考察了一类含有一阶和二阶导数的非线性三阶两点边值问题的解和正解,通过构造适当的Banach空间,利用相应的积分方程,建立了两个存在性定理.结果表明,只要非线性项在其定义域的某个子集上的"高度"是适当的,该问题一定存在一个解或正解.

一类四阶奇边值问题的可解性

运用Ｓｃｈａｕｄｅｒ不动点定理研究了四阶两点边值问题ｄ４ｙｄｘ４＝ ｈ（ｘ）Ｆ（ｘ，ｙ（ｘ））（０＜ ｘ＜ １），ｙ（０）＝ ｙ（１）＝ ｙ″（０）＝ ｙ″（１）＝ ０ 的可解性，允许Ｆ（ｘ，ｙ）在ｘ＝ ０，ｘ＝ １ 或ｙ＝ ０。

一类自由边界问题的正则性研究

研究一类自由边界问题的正则性,通过函数变换,把原来的自由边界问题转化成新的自由边界问题,通过求解新的自由边界问题,相应的自由边界的光滑性得到提高.